Agents leaking stories to get players better deals is something I believe just does not happen anywhere ever.
You think conversations in board rooms are going along the lines of "Just saw Scott McDonald linked with Sydney FC in the Daily Record. Fuuuuuuck, let's offer him another grand a week!"?
Edit - that's just my opinion and I could well be in the minority, I just don't think football agents are as clever/mischevious as some people do.